Frost dates for Mahanoy City 2 N, Pennsylvania
Half of years have their last spring frost by April 30, but 1 year in 10 still frosts after May 18.
A frost date is really a percentile from 30 years of records at a nearby weather station: in about half of years a frost still comes after the median date. Both numbers are below, so you can choose the risk yourself.
The odds
Last spring frost
How often a frost still comes on or after each date.
- 1 year in 10
- May 18
- 1 year in 5
- May 12
- 3 years in 10
- May 7
- 2 years in 5
- May 4
- Half of years (the median)
- April 30
First fall freeze
How often the first freeze comes on or before each date.
- 1 year in 10
- October 7
- 1 year in 5
- October 13
- 3 years in 10
- October 16
- 2 years in 5
- October 19
- Half of years (the median)
- October 22
- Growing season
- about 175 days
- Hardiness zone nearby
- 6b
- Summer days
- a usual high of about 26 °C78 °F
- Lettuce and spinach run to seed
- June to August, in hot, long days (how we know)
Summer and rain
A growing garden needs about 25 mm1 in of water a week, rain and watering together. Here is what a normal month brings.
Month by month
- January
- high ~0 °C33 °F · low ~-8 °C18 °F · rain ~99 mm3.9 in
- February
- high ~2 °C35 °F · low ~-8 °C18 °F · rain ~76 mm3 in
- March
- high ~7 °C44 °F · low ~-4 °C25 °F · rain ~107 mm4.2 in
- April
- high ~14 °C57 °F · low ~3 °C37 °F · rain ~112 mm4.4 in
- May
- high ~20 °C67 °F · low ~8 °C47 °F · rain ~118 mm4.6 in
- June
- high ~24 °C76 °F · low ~13 °C56 °F · rain ~129 mm5.1 in
- July
- high ~27 °C80 °F · low ~16 °C61 °F · rain ~132 mm5.2 in
- August
- high ~26 °C78 °F · low ~15 °C58 °F · rain ~119 mm4.7 in
- September
- high ~22 °C72 °F · low ~11 °C52 °F · rain ~133 mm5.2 in
- October
- high ~16 °C60 °F · low ~5 °C41 °F · rain ~123 mm4.9 in
- November
- high ~9 °C48 °F · low ~-1 °C31 °F · rain ~105 mm4.1 in
- December
- high ~3 °C37 °F · low ~-5 °C23 °F · rain ~109 mm4.3 in
Where these numbers come from
NOAA NCEI 1991–2020 Climate Normals, the Mahanoy City 2 N station (listed by NOAA as Mahanoy City 2 N, USC00365344), at 40.83, -76.14. These are that station’s own records, unshifted. The further your garden is from it, the less exactly they describe your ground. The planner finds the nearest station to your garden and lowers its confidence with distance, so no number is presented as if it were measured in your garden.
Cold air also pools in low ground on the clear, still nights when frost happens, so a hollow can freeze while a slope a few hundred feet away does not. No table can know that about your garden. A few seasons of your own logged frosts can.
ZIP codes nearest this station
17820, 17832, 17834, 17840, 17851, 17888, 17901, 17920, 17921, 17923, 17925, 17930…
+46 moreShow fewer
17931, 17934, 17935, 17936, 17943, 17944, 17945, 17946, 17948, 17949, 17951, 17952, 17953, 17954, 17959, 17965, 17967, 17970, 17974, 17976, 17981, 17982, 17985, 18201, 18202, 18214, 18219, 18220, 18223, 18225, 18230, 18231, 18234, 18237, 18239, 18241, 18242, 18245, 18246, 18248, 18249, 18251, 18252, 18254, 18256, 18635.
Nearby stations
The nearest stations and how their last-frost dates compare. Together they show how frost varies across your area.
- Lehighton 1 SSW, PA, last frost by April 21
- Rodale Rsch Center, PA, last frost by April 26
- Selinsgrove 2 S, PA, last frost by April 25
- Wilkes-Barre International Airport, PA, last frost by April 23
- Mt Pocono Mountains Airport, PA, last frost by May 6
- Lancaster Airport, PA, last frost by April 18
Other stations in Pennsylvania.
- Middletown Harrisburg International Airport, PA, last frost by April 9
- Willow Grove Naval Air Station, PA, last frost by April 11
- Carlisle Wtp, PA, last frost by April 23
- Pleasant Mt 1 W, PA, last frost by May 14
- Phila Franklin Inst, PA, last frost by March 30
- Philadelphia International Airport, PA, last frost by April 2
- Shippensburg, PA, last frost by April 19
- State College, PA, last frost by April 20
When do I plant? · Where the dates come from
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